León, Marta Ximena, Miguel Antonio Sánchez-Cárdenas, Luisa Fernanda Rodríguez-Campos, Jairo Moyano, Andrés López Velasco, Oscar Gamboa Garay, Lina Buitrago, and Liliana De Lima. 2021. “Availability and Accessibility of Opioids for Pain and Palliative Care in Colombia: A Survey Study”. Colombian Journal of Anesthesiology 50 (1). https://doi.org/10.5554/22562087.e1011.